Stock fuel lines and single walbro limit

[leftynridge]

What is the hp limit on stock fuel lines and a single walbro?

 

[mensrea]

430-450 ?
Put it on a dyno and watch the press guage+afrs

 

[san supra]

is the denso much higher?

 

[airhead04]

walbro can handle 500 just fine

 

[Moy]

IIRC, the stock fuel lines start to become a restriction when you get to around 600hp

 

[mensrea]

You can try pushing 500 with single walbro, but it's going to max/lean out. What size injectors you got ?
Just beef up the whole fuel sys with 2 walbro and better lines. Way easier to do it during the build, than taking everything apart and changing shit after you already done work to the car...
Its up to you. Walbros and fuel lines are not that expensive..

 

[ohiosupramst]

Denso's are a better pump I personally wouldn't trust Walbro much above 500hp.

 

[Gt40881j]

im trying to remember the exact number, but i think the highest pump(93oct) power on a single walpro was in the 560whp range in an evo, ive never heard of anyone going over 550whp on the stock line, 3/8 pipe will only allow soo much flow. After i get the car back on the road, im adding a second stock line, second walpro, running dual feed/center return fuel rail with each pump having a dedicated line and a dedicated side of the rail...